Update app.py

app.py

@@ -48,7 +48,7 @@ def generate_preview(image_path):
             img.thumbnail((100, 100))
             buffered = BytesIO()
             img.save(buffered, format="PNG")
-            return f"data:image/png;base64,{base64.b64encode(buffered.getvalue()).decode()"
+            return f"data:image/png;base64,{base64.b64encode(buffered.getvalue()).decode()}"
     except Exception as e:
         print(f"Error generating preview: {e}")
         return None